| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | poligono | poligonoj |
| Accusative | poligonon | poligonojn |
| Danish | pileurt |
|---|---|
| Dutch | duizendknoop; varkensgras |
| English | knotweed; polygonum; knotgrass |
| French | renouée |
| German | Knöterich |
| Italian | poligono |
| Norwegian | hønsegras |
| Russian | горец |
| Spanish | polígono |
| Swedish | pilört |